你不应该检测到什么病毒。

You should not detect a virus.

youdao

但是如果你有用于诊断技术的生物标记物就可以区分它是什么病毒，以及在感染过程中你所处的阶段。

But if you have biomarkers to go along with viral diagnostic techniques you can tell which virus it is and where you are on the continuum of infection.

youdao

这就是为什么许多病毒，如麻疹，只会使我们生病一次。

This is why many viruses, such as measles, make us ill only once.

youdao